The inclusion of U Thong Art of the art before the establishment of Krung Sri Ayutthaya (the mid 13th-14th centuries AD) is of importance to the understanding of the Ayutthaya Art. The U Thong Art is the mixture of the arts from the Past Dvaravati of the Suwan Bhumi artisan family, the Khmer Art of the Past Bayon Period: the Lopburi artisan family and the Ayothaya Art prevalent around Krung Sri Ayutthaya. These three local art forms had been influenced by the Khmer Art of the Bayon Period during the reign of King Chaiworaman VII the Great. And the arts of the tree artisan families emerged during the void of the political power in the area. There was the development and the interchange of the art forms, giving rise to the Pure U Thong Art'. This art form was later passed on to the Early Ayutthaya Art. At first the Ayutthaya Art was developed from the U thong Art. It was then the product of mainly Sukhothai Art as well as subsequently of the Lanna Art. The identity of the Ayutthaya Art was evident in the 16th century AD.The Ayutthaya Art can be divided into 6 categories as follows: